<template>
    <div>
        <!-- 面包屑导航 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
          <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
          <el-breadcrumb-item>权限管理</el-breadcrumb-item>
          <el-breadcrumb-item>角色列表</el-breadcrumb-item>
     </el-breadcrumb>

     <!-- 卡片视图 -->
     <el-card>
         <!-- 添加角色按钮区域 -->
         <el-row>
             <el-col>
                 <el-button type="primary">添加角色</el-button>
             </el-col>
         </el-row>

         <!-- 角色列表区域 -->
         <el-table
         :data="rolelist"
         border
         stripe>
            <el-table-column type="expand">
                <template v-slot="scope">
                    <el-row :class="['bdbottom',i1 === 0 ? 'bdtop':'','vcenter']" v-for="( item1 , i1) in scope.row.children" :key="item1.id">
                        <!-- 渲染一级权限 -->
                        <el-col :span="5">
                            <el-tag closable @close="removRightByid(scope.row,item1.id)">{{item1.authName}}</el-tag>
                            <i class="el-icon-caret-right"></i>
                        </el-col>

                        <!-- 渲染二三级权限 -->

                        <el-col :span="15">
                            <!-- 通过for循环嵌套渲染二级权限 -->
                            <el-row :class="[i2 === 0 ? '':'bdtop','vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                                 <el-col :span="6"><el-tag type="success" closable @close="removRightByid(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                 <i class="el-icon-caret-right"></i>
                                 </el-col>
                                 <el-col :span="17" >
                                     <el-tag v-for="(item3,i3) in item2.children" :key="item3.id" 
                                     type="warning"
                                     style="margin: 10px"
                                     closable
                                     @close="removRightByid(scope.row,item3.id)">{{item3.authName}}</el-tag>
                                 </el-col>
                            </el-row>
                        </el-col>
                    </el-row>
                </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
            <el-table-column label="操作">
                <template v-slot="scope">
                   <!-- 修改按钮 -->
                  <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
                  <!-- 删除 -->
                  <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button> 
                  <!-- 分配角色 -->
                   <el-tooltip effect="dark" content="分配角色" placement="top" :enterable="false">
                      <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                   </el-tooltip>
                </template>
            </el-table-column>
         </el-table>
     </el-card>

     <!-- 分配权限的对话框 -->
     <el-dialog
        title="提示"
        :visible.sync="setRightDialogVisable"
        width="50%"
        @close="setRightDialogClosed">
        <el-tree :data="rightsList" 
        :props="treeProps" 
        show-checkbox 
        node-key="id" 
        :default-expand-all="true" 
        :default-checked-keys="defKeys"
        ref="treeRef"></el-tree>
        <span slot="footer" class="dialog-footer">
          <el-button @click="setRightDialogVisable = false">取 消</el-button>
          <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
</el-dialog>
    </div>
</template>

<script>
export default {
    data(){
        return{
            // 角色列表数据
            rolelist: [],
            setRightDialogVisable: false,
            rightsList: [],
            treeProps: {
                label: 'authName',
                children: 'children'
            },
            defKeys: [],
            // 即将分配权限的id
            roleId: ''
        }
    },
    created(){
        this.getRolesList()
    },
    methods:{
        // 获取数据
        async getRolesList(){
           const {data:res} = await this.$http.get('roles')
           if(res.meta.status != 200) return this.$message.error('获取角色列表失败')
           this.rolelist = res.data;
        //    console.log(this.rolelist);
        },
        // 根据id移除权限
        async removRightByid(row,id){
          const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
          }).catch(err => err)
  
          if(confirmResult != 'confirm'){
              this.$message.info('已取消');
          }else{
              const {data:res} = await this.$http.delete(`roles/${row.id}/rights/${id}`)
              if(res.meta.status != 200) return this.$message.error('删除权限失败')
              this.$message.success('删除成功');
              row.children = res.data
          }
        },
        async showSetRightDialog(role){
            this.roleId =  role.id
            // 获取所有权限列表
            const {data:res} = await this.$http.get('rights/tree');
            if(res.meta.status != 200) return this.$message.error('获取所有权限列表失败');
            // console.log(res);
            // 获取得到的权限数组保存到data中
            this.rightsList = res.data;
            this.getLeafKeys(role,this.defKeys)
            this.setRightDialogVisable = true;
            
        },
        // 通过递归获取三级权限的id
        getLeafKeys(node,arr){
          if(!node.children){
              return arr.push(node.id)
          }

          node.children.forEach(item => {
              this.getLeafKeys(item, arr)
          });
        },
        // 关闭对话框清空defkeys数组
        setRightDialogClosed(){
            this.defKeys = []
        },
        // 点击确定为角色分配权限
        async allotRights(){
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys(),
            ]
            // console.log(keys);
            const idStr = keys.join(',')
            const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids: idStr})
            if(res.meta.status != 200) return this.$message.error('分配失败')
            this.$message.success('分配成功');
            this.getRolesList();
            this.setRightDialogVisable = false
        }
    }
}
</script>

<style lang="less" scoped>
.el-col{
    margin: 7px;
}
.bdtop{
   border-top: 1px solid #eee;
}
.bdbottom{
   border-bottom: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>